Recycling organic residues in agriculture impacts soil-borne microbial community structure, function and N2O emissions

Autor(es)

Suleiman, Afnan Khalil Ahmad ^[1] ; Lourenco, Kesia Silva ^{[2, 3, 1]} ; Pitombo, Leonardo Machado ^[4] ; Mendes, Lucas William ^[1] ; Wurdig Roesch, Luiz Fernando ^[5] ; Pijl, Agata ^[1] ; Carmo, Janaina Braga ^[4] ; Cantarella, Heitor ^[2] ; Kuramae, Eiko Eurya ^[1]

Afiliação do(s) autor(es)

^[1] Netherlands Inst Ecol NIOO, Microbial Ecol Dept, Droevendaalsesteeg 10, NL-6708 PB Wageningen - Netherlands

^[2] Agron Inst Campinas IAC, Soils & Environm Resources Ctr, Av Barao Itapura 1481, BR-13020902 Campinas, SP - Brazil

^[3] Leiden Univ, Inst Biol Leiden, Leiden - Netherlands

^[4] Fed Univ Sao Carlos UFSCar, Dept Environm Sci, Rod Joao Leme Santos Km 110, BR-18052780 Sorocaba, SP - Brazil

^[5] Univ Fed Pampa UNIPAMPA, Ctr Interdisciplinar Pesquisas Biotecnol, Ave Antonio Trilha 1847, BR-97300000 Sao Gabriel - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 631-632, p. 1089-1099, AUG 1 2018.
• Citações Web of Science: 7

Resumo

Recycling residues is a sustainable alternative to improve soil structure and increase the stock of nutrients. However, information about the magnitude and duration of disturbances caused by crop and industrial wastes on soil microbial community structure and function is still scarce. The objective of this study was to investigate how added residues from industry and crops together with nitrogen (N) fertiliser affect the microbial community structure and function, and nitrous oxide (N2O) emissions. The experimental sugarcane field had the following treatments: (I) control with nitrogen, phosphorus, and potassium (NPK), (II) sugarcane straw with NPK, (III) vinasse (by-product of ethanol industry) with NP, and (IV) vinasse plus sugarcane straw with NP. Soil samples were collected on days 1, 3, 6, 11, 24 and 46 of the experiment for DNA extraction and metagenome sequencing. N2O emissions were also measured. Treatments with straw and vinasse residues induced changes in soil microbial composition and potential functions. The change in the microbial community was highest in the treatments with straw addition with functions related to decomposition of different ranges of C-compounds overrepresented while in vinasse treatment, the functions related to spore-producing microorganisms were overrepresented. Furthermore, all additional residues increased microorganisms related to the nitrogen metabolism and vinasse with straw had a synergetic effect on the highest N2O emissions. The results highlight the importance of residues and fertiliser management in sustainable agriculture. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/50694-6 - Emissão de gases do efeito estufa durante o manejo da vinhaça e da palha em áreas cultivadas com cana de açúcar: ampliação da infraestrutura analítica
• Beneficiário: Janaina Braga do Carmo
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/12716-0 - Fluxo dos gases do efeito estufa (co2, n2o e ch4) a partir de solos com cana-de-açúcar em função da adubação com vinhaça concentrada e vinhaça não concentrada em diferentes epocas de aplicação.
• Beneficiário: Késia Silva Lourenço
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/24141-5 - Estudo das redes microbianas (networks) que controlam a emissão de N2O, CO2 e CH4 do solo com cana-de-açúcar
• Beneficiário: Késia Silva Lourenço
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado